1401023231 has 4 divisors (see below), whose sum is σ = 1404144000. Its totient is φ = 1397902464.

The previous prime is 1401023213. The next prime is 1401023251. The reversal of 1401023231 is 1323201041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1401023231 - 2³⁰ = 327281407 is a prime.

It is a super-2 number, since 2×1401023231² = 3925732187603358722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401023251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1559711 + ... + 1560608.

It is an arithmetic number, because the mean of its divisors is an integer number (351036000).

Almost surely, 2^1401023231 is an apocalyptic number.

1401023231 is a deficient number, since it is larger than the sum of its proper divisors (3120769).

1401023231 is an equidigital number, since it uses as much as digits as its factorization.

1401023231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3120768.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1401023231 is about 37430.2448696238. The cubic root of 1401023231 is about 1118.9614179015.

Adding to 1401023231 its reverse (1323201041), we get a palindrome (2724224272).

The spelling of 1401023231 in words is "one billion, four hundred one million, twenty-three thousand, two hundred thirty-one".